Bremer Bay residents warned of worst case scenario

Residents in Bremer Bay have been warned to prepare for a worst case scenario if a fire, north of the town, combines with bad weather.

The fire, which was started by lightning last Thursday, has burnt more than 10,000 hectares of bushland, three kilometres north of the Bremer Bay town site.

Bremer Bay is more than 520 kilometres south-east of Perth.

A total of 120 firefighters are fighting the blaze which is not contained.

Incident controller Greg Mair has told the ABC there is no threat to lives or homes at this stage but residents must be ready to act.

"Preparing the community and preparing our response should the worst case scenario where the fire breaks out from the southern boundary under sort of northerly side wind conditions and burn towards town," he said.